Here's an example code that demonstrates how to use the `groupby` and `agg` functions together:

Grouping Rows into a New Pandas DataFrame with One Row per Group Based on Conditions

Filtering DataFrames to Show Only the First Day in Each Month Using Pandas

Understanding Missing Values in Pandas Library: A New Approach to Replace Missing Values with Mean

Conditionally Inserting Rows into Pandas DataFrames: A Multi-Approach Solution for Interpolation

Mastering Custom Separators in pandas read_csv: A Guide to Regular Expressions

Creating a New Column Based on Index Values: A Deeper Dive into Pandas DataFrame Manipulation

Dynamically Naming Dataframes Based on CSV File Names with Pandas

Filling a List with the Same String in Python Using Pandas and Vectorized Operations

Applying Shift(x) to a Pandas DataFrame Column using Rolling Window: A Comprehensive Guide